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Add initial support for abi3.abi3t tag from PEP 803 #5193

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Add initial support for abi3.abi3t tag from PEP 803 #5193

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5318b67
Add initial support for abi3.abi3t tag from PEP 803
ngoldbaum Feb 24, 2026
5295f9b
fix typo
ngoldbaum Mar 3, 2026
669068b
revert error message change
ngoldbaum Mar 3, 2026
a8316f9
support compressed ABI tags
ngoldbaum Mar 5, 2026
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2 changes: 1 addition & 1 deletion pyproject.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,7 @@ doc = [
ssl = []
certs = []
core = [
"packaging>=24.2",
"packaging @ git+https://github.com/ngoldbaum/packaging@abi3.abi3t",
"more_itertools>=8.8",
"jaraco.text>=3.7",
"importlib_metadata>=6; python_version < '3.10'",
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14 changes: 9 additions & 5 deletions setuptools/command/bdist_wheel.py
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Expand Up @@ -281,11 +281,11 @@ def _validate_py_limited_api(self) -> None:
if not re.match(PY_LIMITED_API_PATTERN, self.py_limited_api):
raise ValueError(f"py-limited-api must match '{PY_LIMITED_API_PATTERN}'")

if sysconfig.get_config_var("Py_GIL_DISABLED"):
if sysconfig.get_config_var("Py_GIL_DISABLED") and sys.version_info < (3, 15):
raise ValueError(
f"`py_limited_api={self.py_limited_api!r}` not supported. "
"`Py_LIMITED_API` is currently incompatible with "
"`Py_GIL_DISABLED`. "
"`Py_LIMITED_API` is incompatible with `Py_GIL_DISABLED` "
"on Python 3.14 and older. "
"See https://github.com/python/cpython/issues/111506."
)

Expand Down Expand Up @@ -345,15 +345,19 @@ def get_tag(self) -> tuple[str, str, str]:
# We don't work on CPython 3.1, 3.0.
if self.py_limited_api and (impl_name + impl_ver).startswith("cp3"):
impl = self.py_limited_api
abi_tag = "abi3"
if sysconfig.get_config_var("Py_GIL_DISABLED"):
abi_tag = "abi3.abi3t"
else:
abi_tag = "abi3"
else:
abi_tag = str(get_abi_tag()).lower()
tag = (impl, abi_tag, plat_name)
tag_str = "-".join(tag)
# issue gh-374: allow overriding plat_name
supported_tags = [
(t.interpreter, t.abi, plat_name) for t in tags.sys_tags()
]
assert tag in supported_tags, (
assert any((t.interpreter, t.abi, plat_name) in supported_tags for t in tags.parse_tag(tag_str)), (
f"would build wheel with unsupported tag {tag}"
)
return tag
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